Q2641. How does prototypal inheritance work in JavaScript?
Prototypal inheritance allows objects to inherit properties and methods from their parent objects. When an object is created with a constructor function, its prototype is...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (2,728 available).
Q2642. What is the difference between prototypal inheritance and classical inheritance?
The main difference between prototypal and classical inheritance is that prototypal inheritance allows objects to inherit properties and methods directly from other objec...
Q2643. What is the difference between an object's prototype and its constructor function?
| Prototype | Constructor Function | | --------------------------------------------------------------------------------- | -----------------------------------------------...
Q2644. How do you add properties and methods to an object's prototype in JavaScript?
We can add properties and methods to an object's prototype by using the constructor function's prototype property. To add a property, simply assign a value to a property ...
Q2645. What is the difference between `Object.prototype` and `Object.__proto__` in JavaScript?
In other words, `Object.prototype` is the object that provides default properties and methods that all objects in JavaScript inherit from. On the other hand, `Object.__pr...
Q2646. How do you check if an object inherits from a specific prototype in JavaScript?
We can check if an object inherits from a specific prototype by using the `isPrototypeOf()` method. This method can be called on a prototype object to check if it appears...
Q2647. How do you override a method in an object's prototype in JavaScript?
We can override a method in an object's prototype by redefining the method on the prototype. To do this, you simply assign a new function to the existing property on the ...
Q2648. What is the difference between Object.create() and new Object() in JavaScript?
The main difference between `new Object()` and `Object.create()` is that `new Object()` creates a new object from scratch, while `Object.create()` creates a new object th...
Q2649. What is the difference between a regular expression and a string?
While both deal with textual data, a **regular expression (RegExp)** and a **string** serve fundamentally different purposes in computer science: | Feature | String | Reg...
Q2650. What is the syntax for creating a regular expression pattern?
The syntax for creating a regular expression pattern consists of a combination of characters, special characters, and operators that define the pattern to match. ``` // D...